List of top Physics Questions asked in KEAM

n number of electrons flowing in a copper wire for 1 minute constitute a current of 0.5 A. Twice the number of electrons flowing through the same wire for 20 s will constitute a current of:
If the maximum number of neighbours of a nucleon within the range of nuclear force is \( p \) and \( k \) is a constant, then the binding energy per nucleon is approximately:
Which one is an INCORRECT statement?
The force of gravity is a:
All real gases behave like an ideal gas at:
The stress required to produce a fractional compression of 1.5% in a liquid having bulk modulus of \( 0.9 \times 10^9 \, {Nm}^{-2} \) is:
The collision in which the two colliding particles move together after collision is called:
Out of the following pair of elements, identify isotones:
If the power of a lens is -2.0 D, then the type and focal length \( f \) of the lens are:
If a freely falling body covers 80 m in the first 4 seconds, then in the next 4 seconds it covers a distance of:
Two gases under the same thermal conditions have the same number of molecules per unit volume. If the respective molecular diameters of the gases are in the ratio 1 : 3, then their respective mean free paths are in the ratio:
If a body at rest undergoes one dimensional motion with constant acceleration, then the power delivered to it at a time \( t \) is proportional to:
A car moving with a speed \( v \) is stopped at a distance \( d \) by a retarding force \( F \). The force needed to stop the same car moving with the speed \( 3v \) within the same distance is:
A balloon of mass 60 g is moving up with an acceleration of 4 m/s\(^2\). The mass to be added to the balloon to descend it down with the same acceleration is (g = 10 m/s\(^2\)):
If a planet orbits the Sun in an elliptical orbit, the quantities associated with the planet that remain constant are:
The quantity of heat conducted through a metal rod kept at its ends at 100°C and 120°C is 5 J/s. If the ends are kept at 200°C and 220°C, then the quantity of heat conducted in 10 seconds is:
During the formation of p - n junction:
If \( E_c \) and \( E_v \) represent the energy of the conduction band and valence band, \( E_D \) represent the donor energy level, and the band gap in a n-type semiconductor, then the true relation among them is:
The equipotential surface is:
The electric field intensity due to an ideal dipole at a distance \( r \) from its center on the axial point is directly proportional to:
In a Carnot engine, the temperature of the sink is 350 K. If the efficiency of the engine is 50%, the temperature of the source should be:
If the position of the particle is \( \mathbf{r} = 3 \hat{i} + 2 t^2 \hat{j} \), then the magnitude of its velocity at \( t = 5 \) second in \( {ms}^{-1} \) is:
A body of mass \( M \) is at equilibrium under the action of four forces \( F_1, F_2, F_3 \), and \( F_4 \). If \( F_1 \) is removed from the body, then the body moves with an acceleration of:
If an ideal engine needs to transmit a torque of 200 Nm to maintain a rotor at a uniform angular speed of 300 rads\(^{-1}\), then the power required for the engine is:
If an ideal gas, in an insulated vessel, is allowed to expand into another similar evacuated vessel through a valve then: